Inner cutter detaching device for dry shavers



Jan. 9, 1940. 1 H, RAND, JR 2,186,122

INNER' CUTTER DETACHING DEVICE FOR DRY ShAVERS Filed nov( 1v, 1937 Y Il IIIIIIIIIIIIIIIIIIIIIIIllllllllllilllilill lli la I3 l 2527 22 22 2| 23 lo l INVENTOR. 20 20 JAMES H.RAND,JR.

BY l ATT RNEY.

Patented Jan. 9, 1940v UNITED STATESv DINER. CUTTER. nE'rAcnlNG DEVICE Fo par snnvEas James H. Band, Jr., Stamford, Conn., assignor, by

mesne assignments, to Re mington Rand Inc.,

Buffalo, N. Y., a corporation of Delaware Application November 17, 1937, Serial No. 174,982y

3 Claims.

This invention relates to improvements on electric dry shavers of a well known type, and particularly to devices in connection therewith for disenga'ging the inner cutters thereof.

5 In all the known dry shavers now commercially in use, it becomes necessary at times to detach the inner cutter from the xed outer cutter head, either to remove the hair clippings or particles therefrom or for other purposes. But in l no instance, so far as is known, is this done -without first removing the entire shearing head or by some other means that proves rather difficult and entails a great waste of time.

It is the general object of this invention to l achieve this result of readily removing the inner cutter by means of the device herein fully clis-v closed.

A specic object of this invention is to provide an inexpensive and adequate means for readily removing the inner cutter of dry Shavers without having rst disengaged the entire shearing head from the motor casing.

Another object of this invention is to provide means for rapidly removing the inner cutters of dry shavers to facilitate the removal of hair particles and clippings that collect therein.

Further objects of this invention will readily appear from the following full and detailed description thereof.

This invention resides substantially in the combination, construction, arrangement, and relative position of parts, all as willbe described in full and complete details in the Vfollowing specification in connection with the drawing at- 35 tached thereto, in which:

. Fig. l is a fragmentary side elevational view of a device embodying the invention herein;

Fig. 2 is a cross section view oi the device taken substantially along line 2-2 of Fig. 1. showing o the cutter heads secured in a non-removable position; Fig.3isaview similartothatshowninFig 2 with only a portion of the casing broken away` and showingv the cutter heads disengaged for 45 the removal of the inner cutter;

Fig. 4 is a view of the device taken substantially along line H oi Fig. 2; 'and Fig. 5 is a view of the device taken substantiall '-eIeng une s-sef Fig.- s, snowing the inner eut- 50 ter head partly removed.

Like characters of references refer to' like parts in-allviews.

Referring to the' wing in detail, thereis showntheupper portionofadryshaverofatype nu weuknownintnenmerwmenn representen.

. of rock lever IIB.

scribed herein as it forms no part of this invention. On one side of casing III is a knurled 8 thumb wheel II which is connected to the motor within. Above this knurled thumb wheel II and near the top of casing I0 is a U-shaped cut-out portion I2. Within the cut-out portion I2 'is a thumb screw I3. Sufilcient allowance is made l0 in said cut-out portion I2 for the head of thumb screw I3 to be turned therein. In the neck of casing III is a rectangular groove I4, into which a fixed outer cutter I5 is secured by said thumb screw I3. Mounted within the xed outer cutter 15 I5 is a reciprocating inner cutter I6.

Below the rectangular groove I4, the casing I0 is formed with an opening Il through which a pivotal cutter-operating rock lever I8 extends.

On each side of said opening II are the open- 20 ings (not shown)' through which resilient pins 2li extend. At each side of openings I9 are pockets 2|, in which springs 22 are loosely held. f

At one side of one of the pockets 2l is a locating lugl 23 which insures correct seating oi the cutter 25 I5 in the groove It.

The iixed outer cutter I5 has mits base three openings, of which 24 represents the central opening registering with opening I1 and through which rock lever I8 extends. The side openings 30 l 25 register respectively with openings I9, and through these openings the resilient pins 20 extend. On each side of the openings 25 are inverted pockets 26 which receive the upper ends of the springs 22. At one side of one of the pockets 26 is a groove 21 which engages the locating lug 23. On one side of the fixed outer cutter I5 and-in the direction of the longitudinal axis of the casing I0 is a rectangular cut-out 28, forming at its lower edge a stop ledge 29. In the center of said cut-out 28 is a small depression 30 shaped to receive the end of thumb screw I3.

Inner cutter I6 has a rectangular groove 3l formed therein, .which groove engages the end On each side of said groove 3l 5 are formed depressions 32 which receive the ends of the resilient pins 20.

In the operation ofthe device according to ythis invention, to secure the outer cutter I l in the 'rectangular groove Il, groove 21 must be ginplaced In alignment with lug 23 and pockets '28 must belforced down on springs 22 until said lsprings are compressed from the position shown nrmly seated within the depression 3l (Fig. 2) and serves as a lock for the outer cutter Il.

To disengage the inner cutter It without removing the outer cutter Il, thumb screw Il is turned until its extreme end is out of engagement with depression 30 though still within the cut-out 28. Then springs 22 will force the outer cutter upwardly (Fig. 3), thus removing depression 30 from alignment with thumb screw I3 and bringing stop ledge 29,into contact with the highly desirable embodiment of my invention, it

is obvious that many changes in form could bel made without departing from the spirit of my in- E vention, and I, therefore, do not limit myself to the exact form herein shown and described, non

to anything less than the whole oi my invention as hereinbefore set forth, and as hereinafter claimed.

What I claim as new and desire to secure by Letters Patent, is:

l. A dry shaver of the type described including a motor casing, a iixed shearing head having an inner cutter reciprqcally mounted therein,

- means for detachably securing said shearing head to the motor casing, spring members between the motor casing and the shearing head, a corresponding number of pockets in the motor casarcaica ing and of inverted pockets on the base of said shearing head to detachably confine said spring members, a rectangular cut-out on said shearing head into which said securing means extends, said cut-out defining stop means for permitting limited longitudinal movement of said shearing head, thereby aIIording means for detaching only said inner cutter therefrom.

2. A dry shaver of the type described including a motor casing, a fixed shearing head having an inner cutter reciprocally mounted therein, means for securing the shearing head to the motor casing, spring members between the motor casing and the shearing head, a corresponding number of pockets in the motor casing and of inverted pockets on the baseof said shearing head to detachably confine said spring members, a rectanguiar cut-out on said shearing head into which said securing means extends, stop means on said cut-out operable by releasing said securing means for limiting the longitudinal movement of said outer cutter head a sumcient amount to disengage the inner cutter head while the outer cutter is still secured to the motor casing.

3. A shaver of the type described including a motor casing, a ilxed shearing head having an inner cutter reciprocally mounted therein, means for securing the shearing head to the motor casing, spring members between the motor caslng and the shearing head. a corresponding number of pockets in the motor casing and oi head to detachably coniine said spring members,

and means on said outer cutter head to dis- JALEES H. RAND, JR.

-inverted pockets on the base of said shearing 

